Metaves ("other birds") is a controversial group proposed by Fain & Houde (2004) and later rescued on the studies of Ericson et al. (2006)Ericson, P.G.P. et al. (2006) Diversification of Neoaves: integration of molecular sequence data and fossils . Biology Letters, 2(4):543–547 and Hackett et al. (2008).Hackett, S.J. et al. (2008) A Phylogenomic Study of Birds Reveals Their Evolutionary History. Science, 320(5884):1763–1768. This group consists of several lineages that diversified early in Neornithes evolution. These lineages include Strisores (, swifts, and Caprimulgiformes), , , Mesitornithidae, Eurypygae (sunbittern and kagu), tropicbirds and Mirandornithes ( and ), but the exact members of Metaves and their relationship differs between those studies, and the group is only supported by the β-fibrinogen gene.Naish, D. (2012). "Birds." Pp. 379-423 in Brett-Surman, M.K., Holtz, T.R., and Farlow, J. O. (eds.), The Complete Dinosaur (Second Edition). Indiana University Press (Bloomington & Indianapolis).
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